Improved Sidelobe Performance of Array Antennas with the Use of Overlapping Sub-Array Architecture

摘要

Array antennas with sub-array architecture are frequently employed in phased array systems. However, the sub-array architecture can introduce severe pattern degradation in the form of higher sidelobes that arise as the frequency is changed or when multiple beams are generated by combining outputs of sub- arrays with a digital beam former. This report presents results of an investigation on the use of overlapping sub-arrays for improving the sidelobe performance.